Magnetic thin film storage device

Details Magnetic thin film storage device Magnetic thin film storage device

1976-02-20

1978-08-22

Moffitt, James W.

Static information storage and retrieval

Systems using particular element

Cells of diverse coercivity

G11C 1908

Patent

active

041093178

ABSTRACT:
A magnetic thin film storage device of simplified design working on the shift register principle and comprising a flat support to which a ferromagnetic layer has been applied, which layer contains regions of different coercivity, lower-coercivity regions being surrounded by regions of higher coercivity, and also comprising electric conductors extending in planes which are parallel to the support, the conductors serving to produce the magnetic fields required to propagate magnetic domains into the lower-coercivity regions, at least one group of channels being provided which terminate in the same enlarged lower-coercivity area, and the magnetic domains contained in the channels terminating in the said enlarged area being propagated individually and consecutively into that enlarged area.
The components of thin-film storage devices of this type can be easily brought into register with the aid of mechanical stops or similar devices and their production can thus be largely automated; besides, the risk of random errors occurring in the flow of data can be substantially reduced, owing to the particularly simple geometric shape of the channels.

REFERENCES:
patent: 3889246 (1975-06-01), Battarel

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